fix(hook): register Claude hook without shell wrapper

[Oxygen56]

Fixes #3482

Summary

• Register the Claude Code hook as an executable plus argument array, avoiding the shell wrapper on Windows.
• Recognize bare and absolute rtk/rtk.exe exec-form hooks across status, verification, initialization, and uninstall flows.
• Upgrade only RTK's exact older combined-command entry in place while preserving user fields, hook order, and third-party hooks.

Test plan

• cargo fmt --all && cargo clippy --all-targets && cargo test
  • cargo fmt --all --check passed.
  • Clippy and focused tests could not start in the offline task environment because the locked automod dependency is absent from the local cache.
• Manual testing: rtk <command> output inspected
  • Native Windows Claude Code end-to-end behavior and the reported performance difference were not measured locally.

Important: This PR targets the develop branch.

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